| 摘要 |
A hob is formed of a body equipped with the seats of machining segments, each of the seats being profiled in a form of two mutually skew planes, where one plane is tangent to a cylinder circumscribed by a radius equal to 0.7 of a radius of the outer diameter of the hob, and the other plane forms with the first one an exterior acute angle, bigger than 30 DEG . During sharpening of the hob, the machining segments rest on identical flat strips. The profiles of the seats in the body and the machining segments of the hob enable fixing of these segments both for the purpose of sharpening and for the operation in the same body, without an application of complicated mechanical catches. |
